What is hair porosity?

Hair porosity refers to the hair's ability to absorb and retain moisture. It is determined by the condition and arrangement of the cuticle layer, which dictates how easily moisture and nutrients can penetrate the hair shaft.

How can I determine my hair's porosity?

You can determine your hair's porosity through simple at-home tests. The Float Test involves placing clean, dry hair strands in a bowl of water, and observing if it floats (low porosity), sinks slowly (medium porosity), or sinks quickly (high porosity). The Slide Test involves sliding your fingers up a hair strand from ends to scalp, and assessing the level of resistance and ease of sliding to determine porosity.

What are the characteristics of low porosity hair?

Low porosity hair has a tightly packed cuticle layer, making it difficult for moisture to penetrate. It tends to have product buildup and can be easily weighed down.

What are the characteristics of high porosity hair?

High porosity hair has a raised and widely spaced cuticle layer. It absorbs moisture quickly but loses it just as fast. It is more prone to frizz, dryness, and damage.

What are the characteristics of medium porosity hair?

Medium porosity hair has a slightly raised cuticle layer and is considered the most balanced. It is generally easier to manage and style.

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How to Perform a Hair Porosity Test: High vs Low Porosity

Hair porosity test demonstration, 3 drawings of water with a strand of hair in each one